Black and Gray tank sizes

[macgyver1]

We have a new 2012 Raptor 365 the liture said it had a 78 gal black and
78 gal gray tank sizes. When we got it it has 2 black & 2 gray tanks. Does anyone know what the capacity of each tank is?

[Festus2]

I am guessing that your 2 gray tanks each hold 39 gal as does your 2 black tanks.

[randy69]

The storage tank control panel can be confusing. 2 gray 2 black. I only have 3 dump valves. So I believe the second black might be for 2 bathrooms rvs. Or a possible add on tank.

[smiller]

You would have to look in the specs (or maybe ask Keystone if the info isn't there) as anything else would be a pure guess. Do you have a galley gray tank? If so it is probably a lot less then the main tank. For example in the 325SRX the total gray water capacity is listed as 76 gallons with 60 in the main tank and 16 in the galley tank.

BTW... 2 black tanks? Do you have two toilets?

[macgyver1]

We have 2 black & 2 gray water tanks. It looks as though both gray tanks
are the same size. They have 2 seperate valves but both empty from the
front sewer conection. With that in mind I bought a new sewer cap with a
garden hose conection. I put a valve on the hose conection and turned it off.
With the back tank showing full & front empty I opened both tank drains and
the back tank equilized with the front both showing 1/3. This now gives me
about 75 to 80 gal of gray water capicity. Would not want to or need to do
this with the black tanks. Also we do have a 1/2 bath in the back.

[Whitehouse]

The storage tank control panel can be confusing. 2 gray 2 black. I only have 3 dump valves. So I believe the second black might be for 2 bathrooms rvs. Or a possible add on tank.
Same here. Panel shows 2 black & 2 grey. I can only find 3 valves. Only 1 toilet in my TH. I'm thinking the panel is for the double bathroom model.